Nut-lock.



G. HARPER.

NUT LOOK.

APPLICATION FILED JAN. 3, 1910. RENEWED SEPT. 21, 1910.

$90 ,732. Patented Apr. 25, 1911.

UNITED STA'1 *I 1 S PATENT OFFICE.

GEORGE HARPER, OF GILMORE, MARYLAND, ASS IGNOR OF ONE-HALF TO MATHEWMARTIN, 0F GILMORE, MARYLAND.

N UT-LOCK.

Patented Apr. 25, 1911.

Application filed January 3, 1910, Serial No. 535,940. Renewed September21, 1910. Serial No. 583,123.

To all whom 'it may concern:

Be it known that I, GEORGE HARPER, a citizen of the United States,residing at Gilmore, in the county of Allegany, State of Maryland, haveinvented certain new and useful Improvements in Nut-Locks; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to locking means for nuts and has for its objectto provide a nut which may be used in connection with a longitudinallychanneled bolt and which nut, while of a size and a material to resistthe usual stresses may be subjected in part to a hammer blow eitherdirect or through the medium of a punch to lock it securely againstremoval under ordinary loosening influences.

A further object of the invention is to provide in the above mentionedconnection, such an arrangement of a single channel as will permit ofthe adjustment of the nutfrom one locking position to another through anangular distance of less than (360 degrees) three hundred and sixtydegrces.

A still further object of the invention is the provision of a nut lockwhich is simple in construction, thoroughly reliable and efficient inoperation, and inexpensive inthe manufacture.

lVith these and other objects'in view,-the invention consists in theconstruction, combination, and arrangement. of parts as will behereinafter more fully described in detail, illustrated in theaccompanying drawings, which disclose the preferred form of em bodimentof the invention, to enable those skilled in the art to practice theinvention, and as pointed out in the claims hereunto appended.

In the drawings z-Figure 1 is a side elevation of a lock nut constructedin accordance with the invention. Fig. 2 is a sectional view on the line2-2 of Fig. 1. Fig. 3 is a longitudinal sectional view through the boltand nut.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Referring to the drawings by numerals, 5 designates a headed bolt of theordinary well known construction with its stem provided with screwthreads 6, extending from the free end of the stem inward toward thehead for a portion of the length of said stem.

Intersecting the thread 6, and formed in the stem or shank of the bolt5, is a helically arranged channel 7 the latter being directed oppositeto the trend of the threads 6, for the purpose as will be hereinaftermore fully described.

Upon the stem or shank of the bolt 5 is mounted a rotatable nut 8, thelatter being internally screw threaded in the ordinary manner to turnupon the threads 6, on said stem or shank of the bolt. The nut 8, isprovided with a transverse opening 9, which communicates with thecentral threaded opening receiving the stem or shank of the bolt, andthe wall of this opening 9, tapers outward from the central opening inthe nut toward one side face thereof. lVithin the opening 9, in the nut8, is introduced a filling 10, of a metal different from that of the nutand susceptible of flow into the threads (5, and channel 7, in the stemor shank of the bolt when the said metal filling 10, is delivered a blowor blows from a hammer, punch, or other suitable tool upon its outersurface and under the influence of such blow or blows to the filling 10,the nut 8, is securely fastened upon the bolt so that it will be heldagainst removal under ordinary loosening influences.

It is obvious that the particular disposition of the channel 7 in thestem of the bolt will permit of adjustment of the bolt from one lockingposition to another through an angular distance of less than (360degrees) three hundred and sixty degrees and in this manner a morepositive and accurate adjustment is attained;

What is claimed is 1. The combination with a bolt having a channelintersecting its threads and progressing helically in a directionopposite to that of the threads, of a nut having a central threadedopening and a transverse opening communicating with its central opening,and a filling in the transverse opening of a metal different from thatof the nut and susceptible of flow into the threads and helical channelof the bolt under the influence of hammer blows upon its outer surface.

2. The combination with a bolt having a channel intersecting itsthreads, of a nut having a central opening and a transverse openingcommunicating with its central opening, and a filling in the transverseopening of a metal different from that of the nut and susceptible offlow into the threads and 10 channel of the bolt under the influence ofhammer blows upon its outer surface.

In testimony whereof, I afiix my signature, in presence of twowitnesses.

GEORGE HARPER. \Vitnesses:

JOHN J. MARTIN, WILLIAM H. MARTIN.

